| Texto completo | |
| Autor(es): |
Alarcon, Rafael Turra
;
Bergoglio, Matteo
;
Cavalheiro, eder Tadeu Gomes
;
Sangermano, Marco
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | POLYMERS; v. 17, n. 5, p. 19-pg., 2025-03-01. |
| Resumo | |
The photopolymerization process in 3D printing is considered greener once it involves a fast reaction and low energy consumption. Various reactions for photopolymerization can be used nowadays, but a special one is the thiol-ene "click" reaction that occurs in equimolar concentrations of thiol and alkene groups. In this sense, solvent-free photopolymerizable formulations were prepared to contain non-modified castor oil, Trimethylolpropane tris(3-mercapto propionate), and cellulosic fillers from hemp, tagua, and walnut. All formulations presented conversions higher than 70% and fast polymerization rates. Moreover, the filled formulations presented excellent curing depths in fewer seconds of light exposition, an important factor for their applicability in 3D printing. Furthermore, the hemp filler formulation presented the highest crosslinking density as determined by the DMTA, and was selected for printing two complex structures (pyramid and honeycomb shape). The rheology analysis showed that the formulations had adequate viscosities for the printer. Lastly, all polymers presented at least 97% bio-based contents, with gel contents superior to 96%. (AU) | |
| Processo FAPESP: | 24/03936-1 - Síntese e exploração de resinas fotocuráveis renováveis para impressão 3D |
| Beneficiário: | Rafael Turra Alarcon |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 22/15211-6 - Preparação e Aplicação de Eletrodos Compósitos à Base de Grafite e Polímeros: miniaturização, eletrodos impressos e sensores flexíveis |
| Beneficiário: | Éder Tadeu Gomes Cavalheiro |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 21/14879-0 - Novo método para síntese de polihidróxiuretanos a partir de triacilglicerol e utilizando catalisadores ou triacilmelamina, visando inibir reações paralelas |
| Beneficiário: | Rafael Turra Alarcon |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |